ID TYSY_FRATT Reviewed; 274 AA. AC Q5NFK5; DT 26-APR-2005, integrated into UniProtKB/Swiss-Prot. DT 01-FEB-2005, sequence version 1. DT 27-MAR-2024, entry version 98. DE RecName: Full=Thymidylate synthase {ECO:0000255|HAMAP-Rule:MF_00008}; DE Short=TS {ECO:0000255|HAMAP-Rule:MF_00008}; DE Short=TSase {ECO:0000255|HAMAP-Rule:MF_00008}; DE EC=2.1.1.45 {ECO:0000255|HAMAP-Rule:MF_00008}; GN Name=thyA {ECO:0000255|HAMAP-Rule:MF_00008}; GN OrderedLocusNames=FTT_1229; OS Francisella tularensis subsp. tularensis (strain SCHU S4 / Schu 4). OC Bacteria; Pseudomonadota; Gammaproteobacteria; Thiotrichales; OC Francisellaceae; Francisella. OX NCBI_TaxID=177416; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=SCHU S4 / Schu 4; RX PubMed=15640799; DOI=10.1038/ng1499; RA Larsson P., Oyston P.C.F., Chain P., Chu M.C., Duffield M., Fuxelius H.-H., RA Garcia E., Haelltorp G., Johansson D., Isherwood K.E., Karp P.D., RA Larsson E., Liu Y., Michell S., Prior J., Prior R., Malfatti S., RA Sjoestedt A., Svensson K., Thompson N., Vergez L., Wagg J.K., Wren B.W., RA Lindler L.E., Andersson S.G.E., Forsman M., Titball R.W.; RT "The complete genome sequence of Francisella tularensis, the causative RT agent of tularemia."; RL Nat. Genet. 37:153-159(2005). CC -!- FUNCTION: Catalyzes the reductive methylation of 2'-deoxyuridine-5'- CC monophosphate (dUMP) to 2'-deoxythymidine-5'-monophosphate (dTMP) while CC utilizing 5,10-methylenetetrahydrofolate (mTHF) as the methyl donor and CC reductant in the reaction, yielding dihydrofolate (DHF) as a by- CC product. This enzymatic reaction provides an intracellular de novo CC source of dTMP, an essential precursor for DNA biosynthesis. CC {ECO:0000255|HAMAP-Rule:MF_00008}. CC -!- CATALYTIC ACTIVITY: CC Reaction=(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + dUMP = 7,8- CC dihydrofolate + dTMP; Xref=Rhea:RHEA:12104, ChEBI:CHEBI:15636, CC ChEBI:CHEBI:57451, ChEBI:CHEBI:63528, ChEBI:CHEBI:246422; CC EC=2.1.1.45; Evidence={ECO:0000255|HAMAP-Rule:MF_00008}; CC -!- PATHWAY: Pyrimidine metabolism; dTTP biosynthesis. {ECO:0000255|HAMAP- CC Rule:MF_00008}. CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00008}. CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00008}. CC -!- SIMILARITY: Belongs to the thymidylate synthase family. Bacterial-type CC ThyA subfamily. {ECO:0000255|HAMAP-Rule:MF_00008}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; AJ749949; CAG45862.1; -; Genomic_DNA. DR RefSeq; WP_003021519.1; NZ_CP010290.1. DR RefSeq; YP_170187.1; NC_006570.2. DR AlphaFoldDB; Q5NFK5; -. DR SMR; Q5NFK5; -. DR IntAct; Q5NFK5; 1. DR STRING; 177416.FTT_1229; -. DR DNASU; 3190786; -. DR EnsemblBacteria; CAG45862; CAG45862; FTT_1229. DR KEGG; ftu:FTT_1229; -. DR eggNOG; COG0207; Bacteria. DR OrthoDB; 9774633at2; -. DR UniPathway; UPA00575; -. DR Proteomes; UP000001174; Chromosome. DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell. DR GO; GO:0004799; F:thymidylate synthase activity; IEA:UniProtKB-UniRule. DR GO; GO:0006231; P:dTMP biosynthetic process; IEA:UniProtKB-UniRule. DR GO; GO:0006235; P:dTTP biosynthetic process; IEA:UniProtKB-UniPathway. DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW. DR CDD; cd00351; TS_Pyrimidine_HMase; 1. DR Gene3D; 3.30.572.10; Thymidylate synthase/dCMP hydroxymethylase domain; 1. DR HAMAP; MF_00008; Thymidy_synth_bact; 1. DR InterPro; IPR045097; Thymidate_synth/dCMP_Mease. DR InterPro; IPR023451; Thymidate_synth/dCMP_Mease_dom. DR InterPro; IPR036926; Thymidate_synth/dCMP_Mease_sf. DR InterPro; IPR000398; Thymidylate_synthase. DR NCBIfam; TIGR03284; thym_sym; 2. DR PANTHER; PTHR11548; THYMIDYLATE SYNTHASE 1; 1. DR PANTHER; PTHR11548:SF1; THYMIDYLATE SYNTHASE-RELATED; 1. DR Pfam; PF00303; Thymidylat_synt; 1. DR PRINTS; PR00108; THYMDSNTHASE. DR SUPFAM; SSF55831; Thymidylate synthase/dCMP hydroxymethylase; 1. PE 3: Inferred from homology; KW Cytoplasm; Methyltransferase; Nucleotide biosynthesis; Reference proteome; KW Transferase. FT CHAIN 1..274 FT /note="Thymidylate synthase" FT /id="PRO_0000140959" FT ACT_SITE 156 FT /note="Nucleophile" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 21 FT /ligand="dUMP" FT /ligand_id="ChEBI:CHEBI:246422" FT /ligand_note="ligand shared between dimeric partners" FT /note="in other chain" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 51 FT /ligand="(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate" FT /ligand_id="ChEBI:CHEBI:15636" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 123..124 FT /ligand="dUMP" FT /ligand_id="ChEBI:CHEBI:246422" FT /ligand_note="ligand shared between dimeric partners" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 176..179 FT /ligand="dUMP" FT /ligand_id="ChEBI:CHEBI:246422" FT /ligand_note="ligand shared between dimeric partners" FT /note="in other chain" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 179 FT /ligand="(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate" FT /ligand_id="ChEBI:CHEBI:15636" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 187 FT /ligand="dUMP" FT /ligand_id="ChEBI:CHEBI:246422" FT /ligand_note="ligand shared between dimeric partners" FT /note="in other chain" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 217..219 FT /ligand="dUMP" FT /ligand_id="ChEBI:CHEBI:246422" FT /ligand_note="ligand shared between dimeric partners" FT /note="in other chain" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" FT BINDING 273 FT /ligand="(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate" FT /ligand_id="ChEBI:CHEBI:15636" FT /evidence="ECO:0000255|HAMAP-Rule:MF_00008" SQ SEQUENCE 274 AA; 31325 MW; A1AFE1C25D79A803 CRC64; MQEYLNFLKY IKENGVLKGD RTGTGTRSIF GYQMRFDLQK GFPLVTTKKI HIPSVVHELL WFLSGSTNIK YLNDNNVRIW NEWATVDGEL GPIYGKQWRD FNGQGIDQIA DVIQMLKTNP NSRRILVSAW NPCVVPSEKI SPQENVVKGN SALPPCHAMF QFYVANNKLS CMLTQRSADA FLGVPFNIAS YSLLTNMVAQ QCNLDVGEFI WSGGDCHIYN NHIEQVNEQL SREPLALPTL KILRKPNSIF DYKYEDFEFE NYNHHPAIKA KISV //